... .EN71,ASTM standards 3.Factory FSC,ICTI certified wooden toys alphabet printing block (JM1072)material:birch+pine wood.size:34*23 ... ,square,triangle,cylinder,rectangular prism,and so on.apply those blocks to build more shapes.2.with parents' help, children can ... learn how to connection and extension blocks.3.with children's effort,they are able to make ...